Alison Wonderland at Red Rocks Amphitheatre on Tuesday, September 15th, 2020 has been rescheduled to Wednesday, September 15th, 2021. AEG Presents is thrilled to announce ALISON WONDERLAND live at Red Rocks Amphitheatre on Tuesday, September 15th, 2021. Download the Red Rocks app before your visit. From digital ticketing with touchless entry, mobile ordering with express beverage pickup, park and venue maps, visitor tips, original Red Rocks content and more, the official Red Rocks app has everything you need for an unforgettable concert experience.